1" NPT, 225 PSI MAX, HEAVY DUTY INDUSTRIAL, THB 4-Stage Ultra Clean Air In-Line Filter Dryer Combination. Stage1: Particulate / Water Removing filter with 5u micron element removes 95% of moisture and contaminants. 11oz Metal bowl with visible sight glass. Manual push drain located on the bottom of the metal bowl. Stage 2: Coalescing / Oil Removing filter with 0.01 micron element removes 99.98% of oil and moisture that passed through stage one. 11oz Metal bowl with visible sight glass. Manual push drain located on the bottom of the metal bowl. Stage 3 & 4: Back to Back In-line Desiccant air dryers will dry out the remaining moist compressed air so the output air is " Ultra Clean ". 11oz Metal bowl with visible sight glass. Desiccant beads turn from blue to pink when its time to be changed. Includes 8 bags of Desiccant Beads. Also included: Full Flow Ball Valve, 1/4 Turn Handle Style. Quantity 2 Male NPT Brass Hex Nipples. One Roll of Pipe Tape. 8 Bags of Desiccant Beads for In-Line Desiccant Air Dryers. THB ULTRA CLEAN HEAVY DUTY INDUSTRIAL 4-STAGE COMPRESSED AIR FILTER WILL REMOVE WATER, MOISTURE VAPOR AND OIL, WHILE SIMULTANEOUSLY DRYING YOUR COMPRESSED AIR LINES. PERFECT FOR COMPRESSED AIR SPRAY BOOTH. THIS HIGH FLOW SYSTEM HAS 11oz METAL BOWLS. THIS SYSTEM IS PERECT FOR FULL INDUSTRIAL APPLICATIONS OR LIGHT INDUSTRIAL AND RESIDENTIAL APPLICATIONS, TWO STAGE AND SINGLE STAGE COMPRESSORS AND TOOLS UNDER 175 PSI. REPLACEMENT FILTERS AND DESICCANT BEADS ARE ON AMAZON. SIMPLY COPY AND PASTE AMAZON ASIN CODE B0B39QPTYZ TO YOUR AMAZON SEARCH BAR. THIS WILL BE A VARIATION LISTING AND YOU CAN ORDER FILTERS INDIVIDUALLY OR WITH BEADS. THE CHOICE IS YOURS. EACH METAL BOWL IS A QUARTER TURN STYLE BOWL TO DISCONNECT THE BOWL FROM THE UNIT. EACH INLET AND OUTLET IS CLEARLY MARKED "IN" AND "OUT". THIS IS A ONE WAY DIRECTIONAL FLOW UNIT WHERE THE INLET SIDE IS THE STAGE 1 PARTICULATE AND THE OUTLET SIDE IS LOCATED ON THE STAGE 4 DESICCCANT AIR DRYER.